Biosensor



FIG. 1 is a perspective view of a biosensor illustrating our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, with the left side elevational view being similar;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a biosensor, as shown and described. 